Electronic cigarette



FIG. 1 is a front elevation view of an electronic cigarette, showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a left-side elevation view thereof;

FIG. 4 is a right-side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view thereof.

The broken lines depict portions of the electronic cigarette that form no part of the claimed design. 

CLAIM The ornamental design for an electronic cigarette, as shown and described. 